WO2015197701A1

WO2015197701A1 - Projection device and method for producing a projection image

Info

Publication number: WO2015197701A1
Application number: PCT/EP2015/064270
Authority: WO
Inventors: Christoph Walter; Karsten Auen
Original assignee: Osram Opto Semiconductors Gmbh
Priority date: 2014-06-25
Filing date: 2015-06-24
Publication date: 2015-12-30
Also published as: DE102014108905A1

Abstract

A projection device (1) is proposed for producing a projection laser beam (2), which comprises a visible laser radiation (211, 212, 213), comprising a light source (10) which emits the visible laser radiation (211, 212, 213), an imaging device (14) which is configured to produce a projection image (32) on a projection surface (3) by means of a change in the propagation direction (α₁,α₂) of the projection laser beam (2), at least one photodiode (12), which is configured to detect different reflection beams (4), which comprise a part of the projection beam (4) reflected on the projection surface (3) at different projection times (t1, t2) and/or in different reflection regions (411, 412) of the projection image (32), and to produce corresponding photodiode signals (121), and an electronic control unit (13) which is configured to control the imaging device (4) and/or the light source in relation to the photodiode signals (121) by means of control signals (133).

Description

description

Projection device and method for generating a projection image

There are a projection device and method for

Generation of a projection image specified.

One problem to be solved is one

Projection device for generating a

Specify projection laser beam. Another object to be solved is a method for generating a projection image by means of the projection device

indicate.

The terms "projection" and / or "illustration" here and in the following do not necessarily designate an optical one

Projection and / or imaging in the physical sense, in which, for example, a lens system can be used. Rather, the terms "projection" and / or "figure" in this case also in their colloquial context to understand and can generally influence the

Properties of a light beam, such as the change of the propagation direction and / or the beam radius of a laser beam, denote.

It is a projection device for generating a

Projection laser beam specified. Preferably, the projection laser beam comprises a visible laser radiation. The visible laser radiation is in this case preferably provided for generating a projection image. In the

Projection device may be, for example, an image or video projector. Furthermore, it may be the projection device to act on an integrated into a mobile device image or video projector. Preferably, the projector is a laser projector, for example a so-called "flying beam" projector.

According to at least one embodiment of the

Projection device, this includes a light source that emits the visible laser radiation. The light source may be, for example, a laser diode.

Further, the light source may include or consist of a plurality of laser diodes, wherein at least a portion of the plurality of laser diodes generates visible laser radiation. For example, each of the laser diodes emits monochromatic laser radiation.

According to at least one embodiment of the

Projection device includes this one imaging

Contraption. The imaging device is to

set up by means of a change in the propagation direction of the projection laser beam to produce a projection image on a projection surface. The imaging device can, for example, a mirror, a grating, a beam splitter and / or in general an optical component, by means of which the

Propagation direction of the projection laser beam can be influenced. When changing the

The propagation direction can be, for example, a deflection of the projection laser beam about a deflection angle.

For example, the projection image is a two-dimensional image composed of a plurality of

Pixel is constructed. In this case, the imaging is Device adapted to cause a change in the horizontal propagation direction and / or a change in the vertical propagation direction for the generation of the projection image. Here and below are the horizontal and the vertical direction of propagation in the context of

Manufacturing tolerances perpendicular to each other. Preferably, the pixels extend along the vertical

and / or along the horizontal direction on the

Screen. It is possible that the

Pixels are arranged like a matrix, wherein the rows and columns of the matrix can run along the vertical or along the horizontal direction. The projection screen can generally be one of the

Projection device remote area, such as a wall and / or a screen act.

For example, the projection image can be generated by means of rapid variation of the propagation direction of the laser, wherein the pixels of the projection image in time

be sequentially projected onto the projection screen. In such a generation of the projection image by means of the imaging device, the projection image, for example, pixel by pixel on the

Projection surface are projected. The speed with which the propagation direction of the projection laser beam is changed is hereby preferably chosen so high that the generation of the projection image by means of the temporally successive projection of the pixels for the human eye can not be distinguished from a simultaneous projection of all pixels. For example, a repetition rate for the entire projection image is 60 Hz or more. The rate at which to switch between the projection of adjacent pixels is then one Many times the repetition rate of the projection image and is directly dependent on the number of pixels.

According to at least one embodiment of the

Projection device includes these at least one

Photodiode. The photodiode is set up to

detect different reflection beams and generate corresponding photodiode signals. The

different reflection rays comprise a part of the on the projection surface to different

Projection times and / or in different

Reflected areas of the projection image

Projection laser beam. The projection laser beam is thus reflected in at least two reflection regions of the projection image on the projection surface. The reflection beams generated in this way are detected by the photodiode and corresponding photodiode signals are generated.

In the present case, the reflection region can be a single pixel of the projection image. It is preferred after at least every hundredth pixel, particularly preferably after every tenth pixel

Photodiode signal generated with the photodiode. In this case, preferably at least every hundredth pixel, particularly preferably at least one tenth pixel, forms one

In the extreme case, it is possible that the reflection radiation reflected at each pixel is detected by the photodiode and converted into a corresponding signal. Alternatively or additionally, the

Reflection on at least two different ones

Reflection times in at least one reflection range

respectively . The reflection laser beams generated by the reflection comprise at least a part of the projection laser beam. For example, at least 5% of the

Projection laser beam in a reflection area

reflected. The reflection laser beam then comprises the reflected at least 5% of the projection laser beam.

According to at least one embodiment of the

Projection device, this includes an electronic

Control unit. The electronic control unit is adapted to the imaging device and / or the

To control light source in dependence on the photodiode signals. The control takes place here with at least one control signal from the control unit in

Dependence on the photodiode signals is generated.

Preferably, the control is carried out with a plurality of control signals. For example, the change of

Propagation direction of the projection laser beam can be influenced by means of the control signals. Furthermore, it is possible that the color and / or the brightness of the projection laser beam generated by the light source with control signals

to be influenced. In other words, an image content of the projection image can be adjusted with the control unit. The adjustment of the image content here can take place in dependence on the photodiode signals or takes place as a function of these signals.

According to at least one embodiment of the

Projection device for generating a

A projection laser beam having visible laser radiation comprises this one light source which emits the visible laser radiation, an imaging device adapted to change by means of a change of the laser beam Propagation direction of the projection laser beam

Projection image to produce on a projection screen, at least one photodiode, which is set up

different reflection rays, a part of the projection surface at different projection times and / or in different reflection ranges of the

Projection image reflected projection laser beam to detect and generate corresponding photodiode signals, and an electronic control unit which is adapted to drive the imaging device and / or the light source in response to the photodiode signals by means of control signals.

In the case of the projection device described here, in particular the idea is pursued with one in the

Projection device built-in photodiode monitoring the projection laser beam, in particular its

Reflection rays to allow. For example, this can during the entire projection of the

Projection image, a distance of the projection device to the projection surface or to areas of the projection surface are determined with a running time measurement. The photodiode signals in this case depend on the

Distance to the respective reflection areas from.

By determining the distance of the

Projection device to the respective reflection areas is sometimes a corresponding adjustment, for example, a two-dimensional size of the projection image on the projection screen to a variable distance between the

Projection device and the projection surface by means of the control signals of the control unit allows. Further, the power of the projection laser beams of the projection apparatus can be adjusted depending on the detected distance to the reflection areas. In conventional projection devices, the problem arises that the intensity of the used

Projection laser beams due to the laser safety is limited to a maximum. This is based on the worst case, in which an eye is located at a distance of about 100 mm in front of the projection device. With the distance measurement integrated in the projection device, for example, it can be ensured here that no eye is too close to the projector and that the power is increased without endangering it. The integrated

Distance measurement can thus be used to improve the safety of the projection laser device.

According to at least one embodiment of the

Projection device, the light source comprises at least one IR laser diode, which is adapted to a

emit monochromatic infrared laser radiation.

For example, a peak wavelength of the infrared laser radiation is between at least 850 nm and at most 1100 nm. The light source thus emits not only the visible laser radiation but also the invisible infrared laser radiation. For example, the light source for this purpose has another

Laser diode that emits the infrared laser radiation.

According to at least one embodiment of the

Projection device, the light source at least one secondary optics, which is adapted to superimpose the beam paths in the light source of generated laser beams within the manufacturing tolerances to a single polychromatic projection laser beam. The secondary optics can To this end, for example, at least one of the following optical elements include: mirror, prism, dichroic mirror, beam splitter, wavelength filter, pellicle beam splitter. The laser beams generated in the light source may in particular be the blue radiation, the green radiation, the red radiation and / or the infrared laser radiation. A single polychromatic projection laser beam can be characterized in that it has a beam diameter corresponding to the maximum beam diameter of the laser beams generated. For example, the

Beam diameter of the projection laser beam

Beam diameter of the infrared laser radiation correspond. In particular, the laser beams may have a common focus. Alternatively or additionally, it is possible that the laser beams at least in places the same

Beam path.

According to at least one embodiment of the

Projection device comprises the projection laser beam, the infrared laser radiation and each reflection beam at least a portion of the infrared laser radiation. For example, for this purpose, the visible laser radiation of the light source with the infrared laser radiation of the light source is superimposed with the at least one secondary optics. The projection laser beam then comprises at least a visible portion and an invisible, infrared portion. Furthermore, in this case, each reflection beam comprises at least a portion of the visible radiation and at least a portion of the infrared laser radiation.

According to at least one embodiment of the

Projection device, the photodiode is adapted to the at least a portion of the infrared laser radiation in each To detect reflection beam. In particular, the infrared laser radiation is preferably reflected in the reflection regions. The photodiode then detects the reflected infrared laser radiation. Preferably, the photodiode generates a much smaller incidence of visible light

Photodiode signal as at incidence of the infrared laser radiation. By "incident radiation" is meant here and below an illumination of the active zone of the photodiode with said radiation. In other words, the photodiode detects infrared radiation more sensitively or more accurately than visible radiation. For example, that is

Photodiode signal at an incidence of infrared radiation twice as high as incidence of visible light of the same power. This can be achieved with a suitably designed photodiode which has the maximum of its sensitivity in the spectral range generated by the IR laser diode.

According to at least one embodiment of the

Projection device comprises the projection laser beam, the infrared laser radiation and each reflection beam at least a portion of the infrared laser radiation and the photodiode is adapted to detect said part of the infrared laser radiation.

The detection of the infrared laser beam instead of and / or in addition to the detection of the visible radiation by means of the photodiode has the particular advantage that the intensity of the reflected portion of the infrared laser radiation, regardless of the image content of

Projection image at the location of the reflection area is. In other words, even at low intensity

visible laser radiation in the generation of For example, a very dark projection image, an infrared laser beam can be projected and detected with a high intensity. According to at least one embodiment of the

Projection device comprises the imaging device at least one mirror and at least one galvanometer. The mirror is set up on the mirror

impinging projection laser beam on the

To divert the projection screen. For this purpose, the galvanometer generates a mechanical movement of one to the galvanometer

mounted rotary arm depending on the control signal of the control unit. The mechanical movement of the rotary arm then causes a vertical tilt and / or a

horizontal tilting of the mirror. By means of this variation of the vertical and / or horizontal tilting of the mirror, the propagation direction of the projection laser beam can be varied. For example, the projection image can thus be projected on the projection surface pixel by pixel.

According to at least one embodiment of the

Projection device generate in the context of

Manufacturing tolerance and the measurement tolerance only the

Reflection beams the photodiode signal. For example, the light source, the photodiode and / or the

Projection device this optical components, which is a direct or indirect incidence of not

at least reflected projection laser beams

suppress. The photodiode can, for example, a

absorbing housing, which include a direct

Beam path between the light source and the photodiode blocks. Furthermore, the projection device can further filtering optics, such as beam splitters, to suppress direct incidence of the projection laser beam on the photodiode. It is possible that small amounts of a projection laser beam from the

Photodiode be detected. The control unit can then be set up, for example, to interpret these small amounts as background noise of the photodiode, wherein the photodiode signal can then be the signal of the photodiode lying above the background noise.

According to at least one embodiment of the

Projection device is the control unit to it

set up, a control signal for controlling the

Light source and / or the imaging device for a true-to-scale, in particular a 1: 1 scale,

Representation of the projection image on the projection surface with varying distance of the projection device to the projection surface and / or to generate the reflection areas. It is possible that the distance varies temporally and / or spatially. For example, first regions of the reflection surface have a smaller distance to the projection device than second regions. Furthermore, it is possible that the projection surface at a first time a smaller distance to the

Projection device than to a second

Time or vice versa. Such a temporal change, for example, by a variation of the absolute position in the space of the projection device and / or the

Projection surface conditionally.

By means of the control unit is also at varying

Distances to the projection surface a true to scale, in particular a 1: 1 to scale reproduction of the Projection image on the screen allows. The calibration of the projection image is done so

continuously. "1: 1 to scale" means here and below, that an external object, one of which to

projecting image is provided in at least two spatial dimensions to be projected the same

Has expansion as the projection image. In other words, with a 1: 1 scale image, the object to be projected and its image can be the same size.

In the present case, the image to be projected may be any image of an external object.

For example, the image to be projected is the image of a car, a workpiece, a

Furnishings or a living thing. For example, it is then possible with the projection device to have a preferably 1: 1 true-to-scale projection image of a

Project furniture. Furthermore, it is possible, for example, a projection image of a

To project dashboard or parts of a dashboard in a car body.

According to at least one embodiment of the

Projection device is the control unit to it

from the duration of each reflection beam, the distance of the projection device to the

Reflection areas of the screen at the time of reflection to determine. For example, for this purpose, the infrared laser radiation individual, temporally

successive laser pulses, with which a transit time measurement at different times and / or in

different reflection ranges is performed. According to at least one embodiment of the

Projection device, the control unit is further adapted to from the distance to the reflection areas required for the particular 1: 1 true to scale representation of the projection image in the reflection areas

Change the vertical direction of propagation and / or

to determine the required change in the horizontal propagation direction of the projection laser beam. For example, it is possible that in the case of a less distant

Reflection range for a particular 1: 1 true to scale representation of the projection image a larger change in the propagation direction is required than in the case of a more distant reflection range. The required change in the propagation direction can, for example, from one to

projecting size of the projection image in the

Reflection range and the distance to the reflection range can be determined. According to at least one embodiment of the

Projection device, the control unit is further adapted to the required for the required change in the vertical and / or horizontal direction of propagation

Generate control signal and to the image-forming

Issue device. For example, for a

in particular 1: 1 representation true to scale a fixed horizontal and / or vertical distance between

Neighboring pixels of the projection image needed. For projection in a reflection area of the

Projection surface is then for example by means of

Control unit needed for this fixed distance

Change of vertical and / or horizontal

Propagation direction of the projection laser beam under Considering the distance to the reflection area of the projection surface determined. The control signals required for the required change in the vertical and / or horizontal propagation direction can be determined, for example, from an initially determined calibration function of the dependence of the respective propagation direction on the control signal.

According to at least one embodiment of the

Projection device is the control unit to it

arranged, from the distance to the reflection region and the required change in the vertical and / or horizontal propagation direction of the projection laser beam a

required vertical and / or horizontal tilting of the

Mirror the imaging device and a control signal required to generate this tilting and output the required control signal to the imaging device. In this case, the change in the vertical and / or horizontal propagation direction is a deflection of the projection laser beam by one

Deflection angle. For example, a larger tilting of the mirror is required for a larger required change in the direction of propagation, ie for a larger deflection angle, than for a smaller required change in the mirror

Propagation direction. Furthermore, it is possible that with

increasing distance the needed change of

Propagation direction is lower. This also reduces the required tilting. For example, in the case of a large required change in the direction of propagation, the control unit generates a high current, which leads to a large mechanical movement of the rotary arm of the galvanometer of the imaging device and thus to a large tilt of the mirror and a large change in the direction of propagation. For the exact determination of the required control signal, for example, before the

Producing the projection image a one-time calibration are performed, in which the change of the horizontal and / or vertical propagation direction of the

Projection laser beam measured as a function of a strength of the control signal and as a calibration function in the

Control unit is stored. Such

Calibration function can determine the required

Serve control signal.

According to at least one embodiment of the

Projection device, the light source comprises at least three laser diodes whose light can mix to white light. For example, a first laser diode emits blue radiation, a second laser diode emits green radiation, and a third laser diode emits red radiation. The blue radiation, the green radiation and the red one are preferred

Radiation respectively monochromatic laser radiation. The blue radiation, the green radiation and the red radiation together form the visible laser radiation of the

Light source. The projection laser beam then comprises the blue radiation, the green radiation and the red radiation. By means of suitable attenuation of the power, and thus the brightness of the generated radiation, at least one of said three laser diodes, pixels of any color can be produced on the projection surface. According to at least one embodiment of the

Projection device, the light source comprises at least three other laser diodes. Here, a first further laser diode emits a blue vertical radiation, a second another laser diode a green vertical radiation and a third further laser diode a red vertical radiation. The polarization direction of the blue vertical radiation, the green vertical radiation or the red vertical radiation is perpendicular to the

Polarization direction of the blue radiation, the green

Radiation or the red radiation.

With such a light source with six different ones

For example, laser diodes that produce different radiations make it possible to produce a projection image that appears three-dimensional when viewed with a so-called SD polarizing filter goggle. For this example, two projection images are projected with the same image content, the two

Projection images on the screen to a

three-dimensional appearing picture are combined. The projection of the first projection image takes place

for example, with the first laser diode, the second

Laser diode and the third laser diode, while the projection of the second projection image with the first another

Laser diode, the second additional laser diode and the third additional laser diode takes place. The laser beams with

mutually perpendicular polarization may have a small offset of the beam path.

According to at least one embodiment of the

Projection device includes this a reading device. The reading device is adapted to read a code and encode information encoded in the code

to process. The code may be, for example, a bar code, a bar code, a matrix code and / or a quick response code. Furthermore, it may be in the code to image or video data, which are stored on a disk. Alternatively or additionally, the

Reading device to be adapted to a digital image of an external object by means of digital imaging

produce. The digital image is

for example, to photograph the external object by means of digital photography.

For example, the projection device is integrated in a mobile terminal, such as a mobile phone, a smartphone and / or a tablet PC. The control unit can also be part of the microprocessor of the mobile

Be terminal. The reading device can likewise be integrated in the mobile terminal. For example, the code, such as a quick response code, can be read in by means of the digital camera of the mobile terminal and the information coded in the code can be processed with the mobile terminal. For example, it is possible that the coded information is a web page on which a digital image is stored. The digital image can then be displayed on the mobile device, for example in the

Control unit to be stored for later projection by means of the projection device. Furthermore, the digital image can be generated with the digital camera of the mobile terminal and for later projection by means of the projection device in the mobile terminal,

in the control unit, for example.

It is further a method for generating a

true to scale, in particular a 1: 1 true to scale projection image indicated. The generation of the

Projection image is preferably carried out by means of a projection device described here. That is, all Features disclosed for the projection apparatus are also disclosed for the method and vice versa.

According to at least one embodiment of the method, an image to be projected and an at least two-dimensional size of the image to be projected are first of all provided. The size to be projected is, for example, the respective vertical and

horizontal extension of the image to be projected.

Preferably, the size is the real size of the object, which is shown on the image to be projected. From the size to be projected results

For example, a horizontal and / or vertical distance of the pixels of the projection image.

According to at least one embodiment of the method, the removal of the projection device to at least two regions of the projection surface and / or the removal of the projection device to a reflection region

determined at least two projection times. The determination of the distance is preferably carried out by means of a transit time measurement with the photodiode and with the control unit.

According to at least one embodiment of the method becomes from the determined distance to the respective

Reflection range by means of the control unit for a, in particular 1: 1 scale representation required at the location of the respective reflection range change in the

Propagation direction of the projection laser beam determined. Furthermore, the control signal required for the required change in the propagation direction is determined by means of the control unit. According to at least one embodiment of the method, the required control signal is generated by means of the control unit and the propagation direction of the

Projection laser beam changed. This change of

Propagation direction is preferably as large as the determined required change in the propagation direction of

Projection laser beam.

In accordance with at least one embodiment of the method, the projection image is determined during the determination of the distance to the reflection regions, the determination of the required

Control signal and the required change of

Propagation direction of the projection laser beam and the generation of the required control signal to change the

Propagation direction of the projection laser beam

Projection image generated. The determination of the distance to the reflection regions thus takes place during the, preferably continuous, generation of the projection image. In accordance with at least one embodiment of the method for producing a true-to-scale, in particular a 1: 1 true-to-scale, projection image with the

Projection apparatus comprising the following steps: a) providing an image to be projected and the projected at least two-dimensional size of the image to be projected,

b) determining the distance of the projection device to at least two reflection regions of the projection surface and / or the distance of the projection device to a reflection region to at least two different ones

Projection times (c) Determination of the change in the scale required for a true - to - scale, in particular true - to - scale, representation at the location of the respective reflection zone

Propagation direction of the projection laser beam and the required control signal with the control unit,

d) generating the control signal with the control unit and changing the propagation direction of the laser beam,

wherein during steps b) to d) the projection image is generated.

In this case, the method steps are preferably carried out in the order indicated and at least partially repeated. In accordance with at least one embodiment of the method, the determination of the required control signal comprises

Control unit in step c) the following others

Steps: - One-time determination of the for a true-to-scale,

in particular for a 1: 1 true to scale representation of the image to be projected horizontal and / or the required vertical distance between two adjacent pixels of the projection image,

Determining a required horizontal and / or a required vertical tilting of the mirror of the imaging device from the distance of the projection device to the reflection region and from the required vertical and / or the required horizontal distance of two

neighboring pixels,

- Determination of the mechanical movement required for the required horizontal and / or vertical tilting at least one rotary arm of the at least one galvanometer of the imaging device,

- Determining the required for the required mechanical movement of the at least one rotary control signal.

The steps are preferably carried out in the order given and at least partially repeated.

The production of true to scale, in particular the 1: 1 true to scale, representation can therefore by a

corresponding tilting of the mirror of the imaging

Device by means of at least one rotary arm of the

Galvanometer done. For example, at a greater distance to the at least one reflection region of the projection surface, a smaller tilt is selected than at a smaller distance. At a greater distance then, for example, a smaller change in the

Propagation direction of the projection laser beam are caused with the mirror. In the present case, the change in the direction of propagation of the

Projection laser beam to a deflection of the

Projection laser beam to a deflection angle.

According to at least one embodiment of the method, the provision of the image to be projected and the size to be projected in step a) takes place with the following

Steps:

Providing a code in which a link is coded to the image to be projected and the size to be projected,

Reading the code with the reading device, - Follow the link and save the image to be projected and the size to be projected in the control unit. For example, the code in a catalog, on a website and / or on a sometimes public

accessible sign provided. Furthermore, the code can be applied to a price tag in a store. The code is preferred with the reading device of

Projection device read out. In the code is

For example, encodes a link to a website and / or to a server accessible via the Internet. On the website and / or the server is then

For example, the image to be projected and its size to be projected are stored. The link can be followed, for example, with a mobile terminal and the image to be projected and the size to be projected can be stored in the mobile terminal, preferably in the control unit contained in the mobile terminal.

steps:

Providing an external object,

- Generating the image to be projected by means of digital imaging of the external object with the reading device, - Determining the size of the projected to

projecting image by means of the projection device. For example, the digital imaging of the external object takes place by means of photography with the digital camera of a mobile terminal comprising the projection device. This will provide a digital image of the external object. The digital image then serves as an image to be projected.

Furthermore, it is possible, during and / or after the digital imaging with the reading device, the size of the external

Object in at least two dimensions with the

To determine projection device. The size of the object in the at least two dimensions then serves as the size of the projection image to be projected. The size of the object in at least two dimensions can be determined from the

Removal of the projection device to at least two

Reflection areas and the horizontal and / or vertical change of the propagation direction of the projection laser beam at the transition between the at least two reflection ranges are determined. This allows both one to

projecting image of an external object as well as the size of the external object to be projected digitally

To provide and then by means of

Projection device to project. Furthermore, it is possible to determine the three-dimensional size of the external object by means of the projection device. For example, in this case the respective distance to a plurality of reflection regions on the surface of the external object can be determined. Preferably, the absolute position in the space of the external object and / or the projection device does not change in this case. This makes it possible, for example, to create a three-dimensional digital model of the external object. In accordance with at least one embodiment of the method, the image to be projected is the image of a piece of furniture. For example, you can

Furnishings are photographed in an apartment and their size can be determined by means of the projection device. The furniture can be a piece of furniture. Furthermore, the projection screen is a room wall.

For example, the image to be projected in one

Catalog of a furniture manufacturer and / or on a price tag of a piece of furniture in a furniture shop as a code, such as a quick response code, a matrix code, a bar code and / or a bar code, are provided.

Generally, from the at least two-dimensional

Dimensions of the furniture and of the

Removal of the projection device to the wall of the room furniture 1: 1 are reproduced to scale on a wall. This makes it possible, for example, without a measurement of the furniture and / or the room wall by means of the projection of the projection image of the furniture object to the room wall a possible

Furnishings of a room to check with the furniture.

In accordance with at least one embodiment of the method, the at least two reflection regions are around

Areas on two mutually transverse room walls. The projection surface thus runs over a corner of a room. By means of the here described Projection device or by means of the method described here, it is thus possible to produce a 1: 1 true to scale projection image of an object on a non-planar projection surface, which preferably has obliquely and / or transversely to each other extending areas. Furthermore, it is possible to determine the unevenness of a projection surface by means of the projection device, and

For example, a three-dimensional model of

To create projection screen.

The following describes the method described here

Production of a coating and the optoelectronic semiconductor component described here with one with a

Method produced coating based on

Embodiments and the associated figures explained in more detail.

FIG. 1 shows a schematic sketch of a

Projection device and a method for generating a projection image.

Figures 2, 3 and 4 show schematic representations of

Explanation of a method for generating a projection image.

The same, similar or equivalent elements are provided in the figures with the same reference numerals. The figures and the proportions of the elements shown in the figures with each other are not to scale

consider. Rather, individual elements can do better

Representability and / or exaggerated for better understanding. 1, a projection device 1 described here and one here are described with reference to the schematic sketch of FIG

described method for generating a projection image 32 on a projection surface 3, 3 ^λ explained in more detail. The projection device 1 comprises a light source 10. The light source 10 has a first laser diode 101, which generates a blue radiation 211, a second laser diode 102, which generates a green radiation 212, and a third laser diode 103, which generates a red radiation 213 , The

Light source 10 further includes an IR laser diode 104 that generates infrared laser radiation 22.

By means of at least one secondary optics 105, the blue radiation 211, the green radiation 212, the red radiation 213 and the infrared laser radiation 22 become a single one

Projection laser beam 2 superimposed. The secondary optics 105 may include, for example, wavelength filters, beam splitters,

Mirrors, dichroic mirrors, pellicle beam splitters

and / or similarly acting optical elements.

The projection device 1 further comprises an imaging device 14. The imaging device 14 comprises a mirror 141 and two pivot arms 142, 143 of a galvanometer (not shown in the figures). By means of the pivot arms 142, 143, a tilting of the mirror 141 can be generated. A tilt of the mirror 141 has a change of

Propagation direction OL - \ _, ί2 ^~ present distractions

Deflection angle OL - \ _, ί2 ^{~ of} the projection laser beam 2 to

Episode. The imaging device 14 is set up by means of a change of the propagation direction OL - \ _, ί2 to a projection image 32 on the projection surface 3, 3 ^λ

produce. The projection surface 3, 3 ^λ hereby a time-variable distance L, L ^x to the

Proj ektionsVorrichtung have.

The projection device 1 additionally comprises a photodiode 12 and a control unit 13. The photodiode 12 is set up as a function of at least one of them

Reflection beam 4 to produce a photodiode signal 121. The photodiode signal 121 is applied to the signal input 131 of FIG

Control unit 13 forwarded. The control unit 13 also generates a control signal 133, which can be tapped at the signal output 132. The control signal 133 is generated in response to the photodiode signal 121. Preferably, the photodiode generates a plurality of photodiode signals 121 as a function of a plurality of reflection beams 4 and

Control unit 13 generates a plurality of control signals 133.

According to the schematic representation of Figure 2 is a

Method for generating a true to scale, in particular a 1: 1 true to scale, projection image 32 with the projection device 1 explained in more detail. FIG. 2 shows a front view of a projection surface 3 onto which a projection image 32 is projected by means of the projection device 1

is projected. The projection image 32 comprises a multiplicity of picture elements 31. The picture elements 31 have a representation of the image which is true to scale, in particular 1: 1

Projection image 32 required horizontal distance dl or a required vertical distance d2 on.

The projection device 1 is arranged in front of the projection surface 3. The projection image 32 is obtained by means of rapid change of the propagation direction OL - \ -, 0 * 2 of the

Projection laser beam 2 pixel 31 for pixel 31 generated. The projection laser beam 2 is at least partially in reflection areas 411, 412 of

Projection surface 3 reflected. The reflected parts of the projection laser beam 2 form reflection beams 4.

By means of the reflection beams 4, the respective

Distance L, L ^x to the reflection areas 411, 412 determined with a running time measurement.

Based on the determined distance L, L ^x to the

Reflecting areas 411, 412 it is possible, the required for the 1: 1 scale representation change the

Determine propagation direction OL - \ _, ί2. For example, a required horizontal distance d 1 between two pixels corresponds to a first deflection angle d 2.

According to the schematic representation of Figure 3 is a

Method for generating a true to scale, in particular a 1: 1 true to scale, projection image 32 with the projection device 1 explained in more detail. In FIG. 2, the entire projection surface 3, 3 ^λ

Different times tl, t2 different distances L, L ^x to the projection device 1 on. For example, the projection surface 3 has a greater distance L at a first time t 1 and a smaller distance L ^{x from} the projection device 1 at a second time t 2. For example, for this purpose, the projection device 1 was moved toward the projection surface 3.

The to 1: 1 true to scale representation of the projection image 32 required horizontal and / or

vertical distance dl, d2 between two pixels 31 of the

Projection image 32 is at both distances L, L so at both times tl, t2, the same. Accordingly, at the second time t2, a larger change in the Propagation direction α. , θ-2 is needed as the first time tl. The deflection OL - \ _, ί2 of the projection laser beam 2 is thus varied as a function of the distance L, L ^x to the projection surface 3, 3 ^λ .

According to the schematic representation of Figure 4 is a

Method for generating a true to scale, in particular a 1: 1 true to scale, projection image 32 with the projection device 1 explained in more detail. In the present case, the projection image 32 is projected onto a projection surface 3, 3 which has two mutually transverse regions 3, 3 ^λ ,

projected. For example, the two are

Regions 3, 3 ^λ to two mutually transverse

Room walls.

The projection device 1 points to a first

Reflection area 411 in the first area 3 of the

Projection surface 3, 3 ^λ a first distance L on. For a second reflection region 412 in the second region 3 ^{λ of} the projection surface 3, 3 ^λ , the projection device 1 has a second distance L ^x . The for a particular 1: 1 true to scale representation of the projection image 32nd

required change of the propagation direction OL - \ _, d2i thus the required deflection OL - \ _, d2i of the projection laser beam 2 is determined by means of the control unit 13 and the photodiode 14 of the projection device 1 and by means of

Control signal 133 implemented. By means of a projection device 1 described here, in particular, 1: 1 true-to-scale representation is therefore also possible on a strongly uneven projection surface 3, 3 ^λ . The present application claims the priority of the German application DE 10 2014 108 905.7, whose

The disclosure is hereby incorporated by reference. The invention is not limited by the description based on the embodiments of these. Rather, the invention encompasses every new feature as well as every combination of features, which in particular includes any combination of features in the patent claims, even if this feature or combination itself is not explicitly described in the claims

Claims or embodiments is given.

Claims

claims

1. projection device (1) for generating a

Projection laser beam (2), which is a visible

Laser radiation includes (211, 212, 213), with

a light source (10) which emits the visible laser radiation (211, 212, 213),

- An imaging device (14) which is adapted to produce by means of a change of the propagation direction ( _] _, o ^) of the projection laser beam (2) a projection image (32) on a projection surface (3),

- At least one photodiode (12) which is adapted to different reflection beams (4), a part of the on the projection surface (3) to different

Projection times (t1, t2) and / or projection beam (4) reflected in different reflection areas (411, 412) of the projection image (32) comprise, detect and generate corresponding photodiode signals (121), and

- An electronic control unit (13), the

is arranged to control the imaging device (4) and / or the light source in response to the photodiode signals (121) by means of control signals (133).

2. Projection device (1) according to the preceding claim, wherein the light source (10) at least one IR laser diode

(104), which is adapted to a

emit monochromatic infrared laser radiation (22).

3. Projection device (1) according to one of the preceding claims,

wherein the light source (10) comprises at least one secondary optic (105) which is adapted to control the beam paths in the light source (10) of generated laser beams (211, 212, 213, 22) to be superimposed within the manufacturing tolerances into a single polychromatic projection laser beam (2).

4. Projection device (1) according to one of the preceding claims,

in which the projection laser beam (2) the infrared laser radiation (22) and each reflection beam (4) comprises at least a portion of the infrared laser radiation (22) and the photodiode (12) is adapted to said part of

Infrared laser radiation (22) to detect.

5. Projection device (1) according to one of the preceding claims,

wherein the imaging device (14) at least one

Mirror (141) and at least one galvanometer, wherein

- The mirror (141) is adapted to the on the

Mirror (141) impinging projection laser beam (2) on the projection surface (3),

- The galvanometer generates a mechanical movement in response to a control signal (133) of the control unit (13) and

- The mechanical movement of the at least one galvanometer, a vertical tilt and / or a horizontal

Tilting the mirror causes.

6. projection device (1) according to one of the previous

Claims,

in which only the reflection beams (4) the photodiode signal

(121).

7. projection device (1) according to one of the previous

Claims, in which the control unit (13) is set up to provide a control signal (133) for controlling the light source (10) and / or the imaging device (14) for a

to scale, in particular a 1: 1 true to scale,

Representation of the projection image (32) on the

Projection surface (3) with varying distance (L) of the projection device (1) to the projection surface (3) and / or to the reflection regions (411, 412) to generate.

8. Projection device (1) according to one of the preceding claims,

in which the control unit (13) is set up

to determine the distance (L) of the projection device (1) to the reflection regions (411, 412) of the projection surface (3) at the respective instant (t1, t2) of the reflection from the transit time of each reflection beam (4);

from the distance (L) to the reflection area (411, 412) one for the true to scale representation of the

Projection image (32) in the reflection areas (411, 412) required change in the vertical and / or horizontal

Propagation direction ( _] _, o ^) of the projection laser beam (2) to determine and

- that for the required vertical and / or horizontal

Change of the propagation direction ( _] _, o ^) needed

Generate control signal (133) and output to the image-forming device (14).

9. projection device (1) according to the preceding claim, wherein the control unit (13) is adapted to

from the distance (L) to the reflection area (411, 412) and the required change of the vertical and / or

horizontal propagation direction ( _] _, o ^) of the

Projection laser beam (2) a required vertical and / or to determine horizontal tilting of the mirror (141) of the imaging device (14) as well as a control signal (133) needed to produce this tilting and

- The required control signal (133) to the imaging

Issue device (14).

10. Projection device (1) according to one of the preceding claims,

in which the light source (10) comprises at least three laser diodes (101, 102, 103), wherein a first laser diode (101) comprises a blue radiation (211), a second laser diode (102) a green radiation (212) and a third laser diode ( 103) emits a red radiation (213).

11. Projection device (1) according to one of the preceding claims,

in which the light source (10) at least three others

Includes laser diodes, wherein

a first further laser diode a blue vertical one

Radiation, a second more laser diode a green one

vertical radiation and a third further laser diode emitting a red vertical radiation and

- The polarization direction of the blue vertical radiation, the green vertical radiation or the red vertical radiation respectively perpendicular to the

Polarization direction of the blue radiation (211), the green radiation (212) and the red radiation (213) is.

12. Projection device (1) according to one of the preceding claims,

comprising a reading device adapted to code such as a bar code Bar code, a matrix code and / or a quick response code to read and process encoded in the code information and / or is adapted to generate a digital image of an external object by means of digital imaging.

13. Method of producing a true-to-scale,

in particular a 1: 1 true to scale, projection image with a projection device (1) according to one of

previous claims with the following steps:

a) providing an image to be projected and the at least two-dimensional size of the image to be projected,

b) determining the distance (L) of the projection device (1) to at least two reflection regions of

Projection surface (3, 3 ") and / or the distance (L) of the projection device (1) to a reflection region (411, 412) at least two different projection times (tl, t2),

c) Determination of the change in the scale required for a true to scale representation, in particular for a 1: 1 scale representation, at the location of the respective reflection region (411, 412)

Propagation direction ( _] _, o ^) of the projection laser beam (2) and the required control signal (133) with the

Control unit (13),

d) generating the control signal (133) with the control unit (13) and changing the propagation direction of the laser beam (i, ₂ ),

wherein during steps b) to d) the projection image (32) is generated.

14. Method according to the preceding claim,

wherein the determination of the required control signal (133) with the control unit (13) in step c) comprises the following further steps:

- one-off determination of the scale-true,

in particular for a 1: 1 scale representation of the horizontal and / or required vertical spacing (d1, d2) of two neighboring pixels (31) of the projection image (32) required for the image to be projected,

Determining a required horizontal and / or a required vertical tilting of the mirror (141) of the imaging device (14) from the distance (L) of the projection device (1) to the reflection region (411, 412) and from the required vertical and / or the

required horizontal distance (dl, d2) of two neighboring pixels (31),

- Determination of the mechanical movement required for the required horizontal and / or vertical tilting

at least one rotary arm (142, 143) of the at least one

Galvanometer of the imaging device,

- Determining the required for the mechanical movement of the at least one rotary arm (142, 143) required control signal (133).

15. The method according to any one of the preceding claims,

providing the image to be projected and the size to be projected in step a) with the following

Steps take place:

Reading the code with the reading device, - Follow the link and save the image to be projected and the size to be projected in the control unit.

16. The method according to any one of the preceding claims,

wherein the providing of the image to be projected and the size to be projected in step a) takes place with the following steps:

Providing an external object,

Generating the image to be projected by means of digital imaging of the external object with the reading device,

- Determination of the size of the projected to

projecting image by means of the projection device.

17. The method according to any one of the preceding claims,

wherein the image to be projected is the image of a furnishing and the projection surface (3) is a room wall.

18. The method according to any one of the preceding claims,

wherein the at least two reflection regions (411, 412) are regions on two mutually transverse chamber walls (3, 3 ^λ ).